When reopening a saved drawing at a later time, or day, I have things missing sometimes. Most frequently my blocks are gone from my points.The lines are still shortened to accomodate the block but no block.

This does not happen everytime, and I cannot notice anything that triggers this.

Circles turn into hexagons, points i can see, and use, are deemed missing on the opening audit, and some lines will not draw between points so I have to manually draw the lines in with the drawline command.

All settings are checked, layers checked, frozen, unfrozen, color changed, all layers frozen and brought back one at a time, toggles toggled, etc.

Bad part is I can not reproduce the problem on demand. This is a very random occurence.